Magneto-electric machine



E. A. WATSON.'

MAGNETO ELECTRIC MACHINE.

APPLICATION FILED IIIAR.23. 1921.

lllllllllllllllllll L ?l Illllllllllllllllll Patented May 24, 1921,`

UNITED STATES PATENT OFFICE.-

ERNEST ANSLEY WATSON, OF'COVENTRY, ENGLAND, ASSIGNOR TO THE C. L. I. MANU- FACTURING COMPANY "LIMITED, OF BIRMINGHAM, ENGLAND.

MAGNETO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented May 24, 1921.

`Application filed March 23, 1921. Serial No. 454,839.

To allwwm t may concern.'

Be it known that I, ERNEST ANSLEY WATSON, a subject of the King of Great Britain and Ireland, residing at 2 St. Andrews road, Earlsdon, Coventry, in the county of vWarwick, England, have invented certain new' and useful Improvements Relating to MagnetoElectric Machines, of which vthe following is a specification.

This invention has for its object to provide magneto electric machines of improved constructions for generating either high tension current only,` of both high and low tension current, for use on motor vehicles and for like purposes.

The invention comprises the combination of a rotary armature which may be wound for the generation of current, straight bar netically connects the magnets arranged to form a pair of parallel sides of a frame or body, a single pole piece joining one pair of ends of the magnets, and a pair of pole pieces connected to the opposite ends of the magnets and 'joined carried the In the accompanying sheet of explanatory drawings: Figure 1 is a cross section, Fig. 2 a longitudinal section and Fig. 3 an end view with cover removed of a high and low tension current generator constructed in accordance with this invention for ignition and lightling purposes on a motor vehicle.

In carrying the invention into effect as shown,a pair of straight bar magnets a are arranged to Jform the parallel vertical sides of a magnetic Jframe. At its lower end the frame is closed by a horizontal pole piece b,

and at its upper end by a magnetic end piece consisting of a pair of parts o d forming pole pieces, these parts being joined by a cross piece e forming the coreon which are carried primary and secondary windings f g for the generation of high tension current. The lower ends of the bar magnets connected by the pole piece b are of like po-` larity as are also the upper ends which are connected by the polepieces c, d and the crosspiece e.

Between 'the pole pieces is arranged a rotary armature 7L which intermittently magparts c d to the pole piece b. It will be apparent to those skilled in the art that during each rotation o f the armature the flux through the part e is intermittently reversed, and four high tension A primary currentl interrupter is employed as in ordinary inductor machines. The interrupter in the form illustrated consists of a fixed contact and movable contact the latter being carried by a spring lever Z which is intermittently actuated through a rod mfrom a laterally projectingface cam n on the rotary armature. The usual condenser across the interrupter contacts is arranged as indicatedat o. It will be understood that this interrupter is in the circuit of the primary winding on the shunt e. High tension current is taken to the sparking plug of a single cylinder engine from a cable terminal p. When used with a multicylinder engine'a distributer'is provided.

With no winding onthe rotary armature the machine operates in the manner of an inductor type magneto for the production' of high tension current for ignition purposes. By the provision of a low resistance winding g on the armature the machine can also generate low tension current for charging aA tension system to supplement the current in4 the latter. y

Having thus described my invention what I claim as new and desire to secure by Letters Patent iszv1. In magneto electric machines, the combination of a pair of Straight bar magnets forming a pair of parallel sides of the machine, a single pole piece connecting one pair of ends of the magnets, a pair o pole pieces connected to the opposite ends of the magnets, a cross piece joining the said pair of pole pieces, a rotary armature, a laterally projecting cam `on the rotary armature, an interrupter on a Stationary part of the machine including a contact supporting spring lever, and a slidable rod maintained in engagement with the cam by the spring lever and operated by the cam to actuate the 'interrupten substantially as .de-

scribed.

impulses are obtained in each revolution. I

2. In magneto electric machines, the comon the rotary armature, a pair of segments bination of a' pair of straight bar magnets' attached to the armature and connected to 10 .forming a pair of parallel sides of the malthe ends of the Winding on 'the armature, chine, a single pole piece connecting one pair and collecting brushes coacting with the of ends of the magnets, a pair of pole pieces saidl segments, substantially as described. connected to the opposite ends of the mag- In testimony whereof 'I have signed .my

nets, a cross piece joining the said pair of 'namev to this specification. pole pieces, a rotary armature, a Winding A ERNEST ANSLEY WATSON. 

